Odpowiedzi

2010-04-06T17:02:47+02:00
Oblicz :
a) 10,6-4 2/3+16 1/15
10,6-20/11/15 =106/10-20/11/15= -10/2/15
b)6 1/2 +(3 1/3 - 1/2 ) :2 5/6-1 3/46
6 1/2+2/5/6 :2 5/6-1 3/46 =9/1/3 :2 5/6-1 3/46=3/5/17 - 1/3/46=2/179/782
c) 7,13/ 2,75-1 3/5
d)6,5+(3 1/3-o,5) / 2 1/3=6.5+2/5/6 / 7/3= 9/1/3 / 7/3= 4
znajdź niewiadomy składnik
a) 3/4 + 2/9 + x + 1 1/4 =4
3/4 + 2/9+ 1 1/4 -4=-x
-1/7/9=-x / - 1
x= 1/7/9
b)o,87+ y+ 2,13+ 5/7 =8
0.87+2.13+5/7-8=-y
3+5/7-8=-y
-4/2/7=-y /-1
y= 4/2/7
23 2 23
2010-04-06T17:10:25+02:00
A) 10,6-4 2/3+16 1/15=
=106/10-14/3+241/15=
=318/30-140/30+482/30=
=318/30+342/30=
=660/30=
=22
b)6 1/2 +(3 1/3 - 1/2 ) :2 5/6-1 3/4=
=13/2+(10/3-1/2):17/6-7/4=
=13/2+(20/6-3/6):17/6-7/4=
=13/2+17/6:17/6-7/4=
=26/4+1-7/4=
=23/4=
=5 3/4=5,75
c) 7,13/ 2,75-1 3/5=
=⁷¹³/₁₀₀:²⁷⁵/₁₀₀-8/5=
=⁷¹³/₂₇₅-8/5=
=⁷¹³/₂₇₅-⁴⁴⁰/₂₇₅=
=²³³/₂₇₅
d)6,5+(3 1/3-o,5) / 2 1/3=
=6,5+(10/3-1/2)/⁷/₃=
=6,5+(20/6-3/6)/⁷/₃=
=6,5+¹⁷/₆:⁷/₃=
=6,5+¹⁷/₁₄=
=91/14+17/14=
=108/14=
=7 10/14

znajdz niewiadomy składnik
a) 3/4 + 2/9 + x + 1 1/4 =4
27/36+8/36+x+45/36=4
80/36+x=4
20/9+x=4
x=1 7/9
b)o,87+ y+ 2,13+ 5/7 =8
3+y+5/7=8
y+5/7=5
y=4 2/7
40 4 40